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Re: Interpolate the NaN in 2D array. [message #91526 is a reply to message #91516]

Thu, 23 July 2015 20:40

wlandsman
Messages: 743
Registered: June 2000

Senior Member

On Thursday, July 23, 2015 at 7:58:10 AM UTC-4, Haje Korth wrote:
>
> INTERPOLATE (instead of INTERPOL) does 2D interpolation. It has a MISSING keyword. Try setting MISSING=!value.f_nan.

I don't believe that INTERPOLATE() can deal with NaN values. The MISSING keyword is used to set an *output* value to elements outside of the range of the input array.

And INTERPOLATE() does not have any way to recognize NAN values as special. For example,

IDL> a = dist(5)
IDL> a[2,3] = !values.f_nan
IDL> print,interpolate(a,2,3)
NaN
IDL> print,interpolate(a,2.3,3.3)
NaN

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[Message index]

		Interpolate the NaN in 2D array. By: anagetinga on Wed, 22 July 2015 10:14
		Re: Interpolate the NaN in 2D array. By: Paul Van Delst[1] on Wed, 22 July 2015 11:04
		Re: Interpolate the NaN in 2D array. By: wlandsman on Wed, 22 July 2015 12:11
		Re: Interpolate the NaN in 2D array. By: Haje Korth on Thu, 23 July 2015 04:58
		Re: Interpolate the NaN in 2D array. By: wlandsman on Thu, 23 July 2015 20:40

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